Upgrade the performance of your BMW G8X M2 / M3 / M4 equipped with the S58 engine with the do88 Performance Auxiliary Radiators – high-performance auxiliary radiators engineered for tuned vehicles, track driving, and aggressive street use. This BMW S58 cooling upgrade helps maintain stable engine temperatures even under demanding conditions where the factory cooling system often reaches its limits.
If you are building a BMW G8X performance setup, the do88 BMW M2 M3 M4 auxiliary radiators are one of the most effective upgrades to improve cooling efficiency and eliminate overheating issues in tuned S58 engines.
The S58 Engine Cooling System
The BMW S58 engine uses an advanced cooling system consisting of three frontal radiators – one large central radiator and two smaller auxiliary radiators positioned in front of each front wheel.
In tuned BMW G8X M2 / M3 / M4 models, which produce significantly more power, the amount of generated heat increases considerably. During aggressive street driving, track sessions, or drag strip runs, maintaining optimal engine temperatures becomes much more challenging.
The factory BMW G8X auxiliary radiators feature relatively thin cores and plastic end tanks, which are not ideal for high-performance builds. For this reason, a BMW S58 auxiliary radiator upgrade is one of the key modifications for improving the overall cooling efficiency.
The do88 Solution – Increased Cooling Capacity
The front-end packaging of the BMW G8X platform allows for larger cooling components with increased frontal surface area and thicker cores on both sides of the vehicle.
Since the original radiators are identical on the left and right sides, the do88 Performance Auxiliary Radiators for BMW G8X are designed as direct plug & play replacements for both sides.
The radiators are offered as a pair because replacing only one unit will not deliver the same cooling improvement as upgrading both simultaneously. The do88 auxiliary radiators for BMW M2 M3 M4 significantly increase cooling capacity and help prevent heat-soak in the S58 engine.
Plug & Play Installation
Installation of the do88 BMW G8X auxiliary radiators is quick and straightforward.
Each radiator features precision CNC-machined mounting brackets and OE-style Quick Connect inlet and outlet connections, allowing full compatibility with the factory cooling system lines.
The original BMW rock guards can also be mounted directly onto the do88 radiators, providing effective protection against small rocks and road debris.
Key Features
- 43% larger core volume compared to the OEM radiator
- 2-row core with 48 mm thickness
- 13% increased active cooling area
- full aluminum construction
- durable TIG-welded end tanks
- increased coolant capacity for improved heat dissipation
COMPATIBILITY
BMW M2 (G87)
Engine: S58
Model years: 2023 - 202X
BMW M3 / M3 Competition / M3 CS (G80, G81)
Engine: S58
Model years: 2020 - 202X
BMW M4 / M4 Competition / M4 CSL (G82, G83)
Engine: S58
Model years: 2020 - 202X
